| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 11a - John Day/Clarno Uplands |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 97845 - John Day, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 23 | 27 | 31 | 37 | 43 | 47 | 46 | 40 | 33 | 27 | 21 | 33 |
| Avg Max Temp (°F) | 39 | 45 | 51 | 58 | 66 | 74 | 84 | 85 | 76 | 63 | 47 | 40 | 61 |
| Avg Precip (In.) | 1.19 | .88 | 1.33 | 1.42 | 1.77 | 1.3 | .63 | .82 | .75 | .9 | 1.44 | 1.42 | 13.85 |